diff --git a/CMakeLists.txt b/CMakeLists.txt
index b15d104aa..bf5f66013 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,7 +39,7 @@ IF(CMAKE_COMPILER_IS_GNUCXX OR MINGW)
 	SET(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} -s")  ## Strip binary
 
 	# Release with debug info compiler flags
-	SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -g3 -O3") 
+	SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} -g3") 
 
 	# Release minimum size compiler flags
 	SET(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} -O3")
diff --git a/source/g3d_viewer/CMakeLists.txt b/source/g3d_viewer/CMakeLists.txt
index cc854c78b..22517ac5c 100644
--- a/source/g3d_viewer/CMakeLists.txt
+++ b/source/g3d_viewer/CMakeLists.txt
@@ -72,6 +72,7 @@ SET(GLEST_LIB_INCLUDE_DIRS
     ${GLEST_LIB_INCLUDE_ROOT}graphics/gl
     ${GLEST_LIB_INCLUDE_ROOT}map
     ${GLEST_LIB_INCLUDE_ROOT}sound
+    ${GLEST_LIB_INCLUDE_ROOT}streflop
     ${GLEST_LIB_INCLUDE_ROOT}xml
     ${GLEST_MAIN_INCLUDE_ROOT}graphics
     ${GLEST_MAIN_INCLUDE_ROOT}game